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Re: Find shift and rotation between two images. [message #65214 is a reply to message #65142]

Sat, 14 February 2009 18:22

KRDean
Messages: 69
Registered: July 2006

Member

frankosuna wrote:
> Is there code out there to figure out by how many pixels an image is
> shifted from it's original as well as the angle?

Image registration (shift and rotation) is a popular subject on this
newsgroup. Have you looked for previous post on this topic in idl-
pvwave?

I found these two papers to be very helpful when I was investigating
image registration techniques dealing with FFT using IDL to find shift
and rotation.

An IDL/ENVI implementation of the FFT-based algorithm for automatic
image registration
By Hongjie Xie

and

Understanding FFT- based algorithm to calculate image displacements
with IDL programming language
By Cynthia Rodriguez, University of Texas at San Antonio

There is a Word DOC of Xie's paper at UTEP ...

http://research.utep.edu/Default.aspx?PageContentMode=1& tabid=30376

However, my favorite IDL image registration process are the auto
alignment IDL routines by T. Metcalf that are found at SOHO. He
doesn't use FFT's, but implements cross correlation techniques that
work very well to find shift and rotation between images.

Kelly Dean
Fort Collins, CO

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[Message index]

		Find shift and rotation between two images. By: frankosuna on Thu, 12 February 2009 13:10
		Re: Find shift and rotation between two images. By: KRDean on Tue, 17 February 2009 07:09
		Re: Find shift and rotation between two images. By: frankosuna on Mon, 16 February 2009 18:12
		Re: Find shift and rotation between two images. By: Thomas Launey on Mon, 16 February 2009 18:07
		Re: Find shift and rotation between two images. By: Vince Hradil on Sat, 14 February 2009 18:50
		Re: Find shift and rotation between two images. By: KRDean on Sat, 14 February 2009 18:22
		Re: Find shift and rotation between two images. By: venom25 on Thu, 27 June 2013 13:12

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